<template>
  <!-- <div>
    <el-button type="info" @click="logout">退出</el-button>
  </div> -->

  <el-container class="home-container">
  <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/logo.png" alt="" class="imge">
      <span>电商管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体区 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
      <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff"
      :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true"
      :default-active="activePath">
        <!-- 一级菜单 -->
        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
          <template slot="title">
            <!-- 图标 -->
            <i class="el-icon-location"></i>
            <!-- 文本 -->
            <span>{{item.authName}}</span>
          </template>

          <!-- 二级菜单 -->
          <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id">
          <template slot="title" @click="saveNavState('/' + subItem.path)">
            <i class="el-icon-menu"></i>
            <span>{{subItem.authName}}</span>
          </template>
          </el-menu-item>
        </el-submenu>
      </el-menu>
    </el-aside>
    <!-- 右侧主体区 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [
        {
          id: 101,
          authName: '用户管理',
          path: 'null',
          children: [
            {
              id: 104,
              authName: '用户列表',
              path: 'users',
              children: []
            }
          ]
        },
        {
          id: 106,
          authName: '权限管理',
          path: 'null',
          children: [
            {
              id: 118,
              authName: '角色列表',
              path: 'roles',
              children: []
            },
            {
              id: 107,
              authName: '权限列表',
              path: 'rights',
              children: []
            }
          ]
        },
        {
          id: 206,
          authName: '商品管理',
          path: 'null',
          children: [
            {
              id: 218,
              authName: '商品列表',
              path: '',
              children: []
            },
            {
              id: 207,
              authName: '分类参数',
              path: 'null',
              children: []
            },
            {
              id: 208,
              authName: '商品分类',
              path: 'null',
              children: []
            }
          ]
        }
      ],
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    // this.activePath = window.sessionStorage.getItem('activePath')
    this.activePath = '/users'
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menu')
      console.log(res)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      // window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 10px;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div{
  display: flex;
  align-items: center;
}
.el-header div span{
  margin: 15px;
}
.imge{
  height: 40px;
}
.el-aside{
  background-color: #333744;
}
.el-aside .el-menu {
    border-right: none;
  }
.el-main{
  background-color: #eaedf1;
}

.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
